Athlete, actor and activist Aimee Mullins talks about her prosthetic legs — she’s got a dozen amazing pairs — and the superpowers they grant her: speed, beauty, an extra 6 inches of height … Quite simply, she redefines what the body can be.

• Read more...

Legendary ocean researcher Sylvia Earle shares astonishing images of the ocean — and shocking stats about its rapid decline — as she makes her TED Prize wish: that we will join her in protecting the vital blue heart of the planet.

• Read more...

David Gallo shows jaw-dropping footage of amazing sea creatures, including a color-shifting cuttlefish, a perfectly camouflaged octopus and a Times Square’s worth of neon light displays from fish who live in the blackest depths of the ocean.

• Read more...

Barry Schwartz makes a passionate call for “practical wisdom” as an antidote to a society gone mad with bureaucracy. He argues powerfully that rules often fail us, incentives often backfire, and practical, everyday wisdom will help rebuild our world.

• Read more...

MIT grad student David Merrill demos Siftables — cookie-sized, computerized tiles you can stack and shuffle in your hands. These future-toys can do math, play music, and talk to their friends, too. Is this the next thing in hands-on learning?

• Read more...